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51. 发明专利

JP2000262897A EXHAUST GAS PURIFYING CATALYST AND EXHAUST GAS PURIFYING METHOD 失效
公开(公告)号：JP2000262897A
公开(公告)日：2000-09-26
申请号：JP6873299
申请日：1999-03-15
申请人： TOYOTA CENTRAL RES & DEV
发明人： TAKAHASHI NAOKI , SAIKI MOTOHISA , TANAKA TOSHIYUKI , YAMAZAKI KIYOSHI , SUDA AKIHIKO , MATSUNAGA SHINICHI , YAMAMOTO TOSHIO , TSUJI RYUSUKE , SUGIURA MASAHIRO
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58 , F01N3/08 , F01N3/10 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst showing NOx occuluding capacity within a reaction temp. region of 250-650 deg.C even after a high temp. durability test and being suppressed in the lowering of NOx purifying capacity even in SOx-containing exhaust gas. SOLUTION: An exhaust purifying catalyst includes a carrier consisting of first double oxide represented by MgO-Al2O3 and second double oxide represented by TiO2-ZrO2, an NOx occluding element containing at least Na and Ba supported on the carrier and a noble metal supported on the carrier. MgO-Al2O3 double oxide is low in the reactivity with NOx occuluding element as compared with alumina and TiO2-ZrO2 double oxide is low in the reactivity with the NOx occuluding element as compared with TiO2 and Na does not generate double sulfate by the reaction with Mg liberated from double oxide and SOx and Ba is excellent in NOx occluding capacity within a low temp. region and, therefore, this catalyst can maintain high NOx purifying capacity even after a durability test.

52. 发明专利

JPH1119514A CATALYST FOR CLEANING LEAN EXHAUST GAS 失效
公开(公告)号：JPH1119514A
公开(公告)日：1999-01-26
申请号：JP17178497
申请日：1997-06-27
申请人： TOYOTA CENTRAL RES & DEV
发明人： SUDA AKIHIKO , SHINJO HIROBUMI , KAMITORI TOSHIO , TERAO NAOHIRO
IPC分类号： B01D53/86 , B01D53/94 , B01J23/63
摘要： PROBLEM TO BE SOLVED: To provide a catalyst for cleaning lean exhaust gas by which ceria/ zirconia solid solution in lean exhaust gas is inhibited from being poisoned by sulfur and durability is enhanced. SOLUTION: The catalyst for cleaning lean exhaust gas is constituted of oxide solid solution particles, in which solid solubility of zirconium oxide for cerium oxide in ceria/zirconia solid solution is >=50% and average diameter of crystallite is

53. 发明专利

JPH10146528A AMMONIA DENITRATION CATALYST 失效
公开(公告)号：JPH10146528A
公开(公告)日：1998-06-02
申请号：JP30912796
申请日：1996-11-20
申请人： TOYOTA CENTRAL RES & DEV
发明人： ITO YOSHIHIKO , MATSUNAGA SHINICHI , SUDA AKIHIKO
IPC分类号： B01D53/86 , B01D53/94 , B01J23/44 , B01J23/60 , B01J23/63
摘要： PROBLEM TO BE SOLVED: To convert NOX in exhaust gas efficiently into N2 by making an alumina carrier carry at least palladium and zinc in a substance in which nitrogen oxides in exhaust gas are brought into contact with ammonia for purification. SOLUTION: An ammonia denitration catalyst which is used in a process in which nitrogen oxides(NOX) in exhaust gas discharged from an electric power plant, etc., are brought into contact with ammonia for purification is prepared by making an alumina carrier carry at least palladium (Pb) and zinc (Zn). Or, it is prepared by making a porous carrier of ceria carry at least Pd. In the ammonia denitration catalyst, NOX purifying performance can be improved further by the coexistence of Pd and Zn. The content of Zn is preferably 0.05-1 mole per 120g of the alumina carrier, and 0.1-25g of Pd is carried preferably by 120g of the alumina carrier.

54. 发明专利

JPH1070010A THERMISTOR COMPOSITION 失效
公开(公告)号：JPH1070010A
公开(公告)日：1998-03-10
申请号：JP24260196
申请日：1996-08-26
申请人： TOYOTA CENTRAL RES & DEV
发明人： FUKANO TATSUO , UKIYOU YOSHIO , KAMITORI TOSHIO , SUDA AKIHIKO , TERAO NAOHIRO
IPC分类号： C01G25/00 , H01C7/04
摘要： PROBLEM TO BE SOLVED: To reduce the temperature change of a thermistor constant make the linearity of a thermistor characteristic in a wide temperature measuring range good, by specifying the composition of a solid solution made of cerium and zirconium oxides. SOLUTION: A thermistor composition can be manufactured easily out of cerium and zirconium oxides. That is, cerium oxide and zirconium oxide with specific surface areas not smaller than, e.g. 50m /g are weighed to make the ratio of the one oxide to the other one predetermined, and they are mixed with each other to dry the mixture after crashing it by a ball mill. Then, pressing the obtained powder of a required amount to mold it in the form of. e.g. a circular plate, the resultant material is burned at a temperature not lower than, e.g. 1600 deg.C to obtain a burned substance. The heat treatment of this burned substance is performed in the atmosphere of, e.g. argon or nitrogen at a temperature not lower than, e.g. 1400 deg.C. Further, the thermistor composition obtained in this case is manufactured out of a solid solution made of cerium oxide and zirconium oxide to be represented by a composition formula of Cex Zr1-x O2 , where x represents a numerical value of 0.2-0.8.

55. 发明专利

JPH09155192A EXHAUST GAS PURIFYING CATALYST 失效
公开(公告)号：JPH09155192A
公开(公告)日：1997-06-17
申请号：JP31941395
申请日：1995-12-07
申请人： TOYOTA CENTRAL RES & DEV
发明人： SUDA AKIHIKO , SOFUGAWA HIDEO , SUZUKI TADASHI , KAMITORI TOSHIO , UKIYOU YOSHIO , SUGIURA MASAHIRO , KIMURA MAREO , HIRAYAMA HIROSHI , IKEDA YASUO
IPC分类号： B01D53/94 , B01J21/16 , B01J23/63 , C01F17/00
摘要： PROBLEM TO BE SOLVED: To provide excellent purifying capacity capable of being fitted to the prescription of exhaust gas further severe in recent years and in the future by using a ceria/zirconia solid soln. large in OSC and having a sufficiently high oxygen occluding/discharge speed. SOLUTION: In an exhaust gas purifying catalyst obtained by making a noble metal being a catalytic component and a cocatalyst supported with a carrier, the cocatalyst is particles of a mutual solid soln. of ceria and zirconia and the solid soln. degree of zirconia to ceria in particles is 50% or more and the average particle size of crystals constituting the particles is set to 100nm or less.

56. 发明专利

JPH07284672A PRODUCTION OF CATALYST 失效
公开(公告)号：JPH07284672A
公开(公告)日：1995-10-31
申请号：JP8195194
申请日：1994-04-20
申请人： TOYOTA CENTRAL RES & DEV
发明人： SUDA AKIHIKO , UKIYOU YOSHIO , SOFUGAWA HIDEO
IPC分类号： B01D53/86 , B01D53/94 , B01J21/12 , B01J23/02 , B01J23/10 , B01J23/40 , B01J23/46 , B01J23/58 , B01J23/63 , B01J37/02 , B01J37/03 , B01J37/04
摘要： PURPOSE:To produce a catalyst having high catalytic activity even at high temp. by mixing powder made of fine alumina particles including a specified percentage of particles having a specified particle diameter in a slurried state with a catalytic component and a material inhibiting the sintering of fine alumina particles, drying and firing the resultant mixture. CONSTITUTION:Powder made of alumina particles carrying a catalytic component and including >=50wt.% particles in a range of =50wt.% particles in a range of =50wt.% particles in a range of =50wt.% particles in a range of =50wt.% particles in a range of

57. 发明专利

JPH06199582A PRODUCTION OF POROUS BODY 失效
公开(公告)号：JPH06199582A
公开(公告)日：1994-07-19
申请号：JP28590693
申请日：1993-10-19
申请人： TOYOTA CENTRAL RES & DEV
发明人： SUDA AKIHIKO , UKIYOU YOSHIO , WADA SHIGETAKA
IPC分类号： C04B35/18 , C04B38/00
摘要： PURPOSE:To obtain a porous body having a large surface even at a high temp. of >=1,200 deg.C by mixing powder made of specified alumina particles with a specified powder, sol or soln. in a medium, drying and firing the mixture. CONSTITUTION:Powder made of alumina particles not contg. water in the particles and having 10-100nm average particle diameter is mixed with at least one of the following components (a)-(e), etc., in a medium for mixing, the medium is then removed by drying and the resulting mixture is fired to obtain the objective porous body. The component (a) is powder made of silica particles not contg. water in the particles and having =500nm average particle diameter and (e) is a sol prepd. by dispersing particles contg. alumina and silica in each of the particles and having

58. 发明专利

JP2006095513A Method for producing porous composite metal oxide 有权
标题翻译：生产多孔复合金属氧化物的方法
公开(公告)号：JP2006095513A
公开(公告)日：2006-04-13
申请号：JP2005229320
申请日：2005-08-08
申请人： Toyota Central Res & Dev Lab Inc , 株式会社豊田中央研究所
发明人： YAMAMOTO TOSHIO , SUDA AKIHIKO , MORIKAWA AKIRA , YAMAMURA YOSHIE , YONEKURA HIROTAKA
IPC分类号： B01J37/04 , B01D53/86 , B01D53/94 , B01J23/63 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a porous composite metal oxide which is very excellent in durability against high-temperature, maintains a specific surface area and cleaning performance at a high level even at high temperature and is useful as an exhaust gas cleaning catalyst, and the like. SOLUTION: This method for producing the porous composite metal oxide includes: a dispersing step of dispersing first metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, in a dispersion medium by use of microbeads each with a diameter of not larger than 150 μm, thus obtaining first metal oxide particles, which are 1 nm to 50 nm in average particle diameter, and not less than 80 mass% of which are not larger than 75 nm in diameter; a dispersing-mixing step of dispersing and mixing up, in a dispersion medium, the first metal oxide particles and second metal oxide powder, which is the aggregate of primary particles each with the diameter of not larger than 50 nm, and which is not larger than 200 nm in average diameter, thus obtaining a homogeneously-dispersed liquid in which the first metal oxide particles and second metal oxide particles are homogeneously dispersed; and a drying step of drying the homogeneously-dispersed liquid, thus obtaining the porous composite metal oxide. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：待解决的问题：为了提供一种制造耐高温性极好的多孔复合金属氧化物的方法，即使在高温也能保持高水平的比表面积和清洗性能，并且可用作废气净化催化剂等。解决方案：该多孔复合金属氧化物的制造方法包括：分散工序，将分散介质中作为一次粒径为50nm以下的粒子的第一金属氧化物粉末分散在分散介质中的微珠，其直径不大于150μm，得到平均粒径为1nm〜50nm，直径不大于75nm的80质量％以上的第一金属氧化物粒子。分散混合步骤，在分散介质中分散第一金属氧化物颗粒和第二金属氧化物粉末，第一金属氧化物颗粒和第二金属氧化物粉末是直径不大于50nm的一次颗粒的聚集体，并且不大于平均直径超过200nm，由此获得均匀分散的液体，其中第一金属氧化物颗粒和第二金属氧化物颗粒均匀分散; 和干燥步骤，干燥均匀分散的液体，从而得到多孔复合金属氧化物。版权所有（C）2006，JPO＆NCIPI

59. 发明专利

JP2005342580A Catalyst carrier and its production method 审中-公开
标题翻译：催化载体及其生产方法
公开(公告)号：JP2005342580A
公开(公告)日：2005-12-15
申请号：JP2004163009
申请日：2004-06-01
申请人： Toyota Central Res & Dev Lab Inc , 株式会社豊田中央研究所
发明人： IMAGAWA HARUO , SUDA AKIHIKO , MATSUNAGA SHINICHI , TANAKA TOSHIYUKI
IPC分类号： B01D53/86 , B01J21/06 , B01J32/00 , B01J37/03
摘要： PROBLEM TO BE SOLVED: To further make the mixed state of respective metal oxides uniform in a catalyst carrier made of a compounded oxide consisting of a plurality of types of metal oxides. SOLUTION: A starting material solution in which a plurality of types of metal ions including aluminum ion are dissolved is added to a neutralization solution containing an alkaline substance in an amount equivalent or higher to neutralize the acidic ions in the starting material solution and the co-precipitated oxide precursors are fired to obtain a compounded oxide. Since an excess amount of the neutralization solution constantly exists to the starting material solution, the oxide precursors of the respective metals are almost simultaneously precipitated and deposited. Accordingly, production of a localized part where alumina unevenly exists can be suppressed and existence of aluminum atoms in a high concentration can be suppressed even in the produced localized part and therefore the content of aluminum atoms in the localized part is controlled to be 90% by atom or less. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了进一步使由各种金属氧化物组成的复合氧化物制成的催化剂载体中的各种金属氧化物的混合状态均匀。解决方案：将含有多种类型的包含铝离子的金属离子溶解在其中的原料溶液加入到含有相当于或更高量的碱性物质的中和溶液中以中和原料溶液中的酸性离子，共沉淀氧化物前体被烧制以获得复合氧化物。由于过量的中和溶液不断地存在于原料溶液中，所以各金属的氧化物前体几乎同时沉淀沉积。因此，可以抑制氧化铝不均匀存在的局部化部分的制造，即使在制造的局部化部分中也可以抑制高浓度的铝原子的存在，因此局部化部分中的铝原子的含量被控制为90％原子或更少。版权所有（C）2006，JPO＆NCIPI

60. 发明专利

JP2004122023A Heat treatment method for catalyst for cleaning exhaust gas 审中-公开
公开(公告)号：JP2004122023A
公开(公告)日：2004-04-22
申请号：JP2002291204
申请日：2002-10-03
申请人： Toyota Central Res & Dev Lab Inc , 株式会社豊田中央研究所
发明人： YONEKURA HIROTAKA , MORIKAWA AKIRA , SUDA AKIHIKO , MATSUNAGA SHINICHI
IPC分类号： F01N3/10 , B01D53/86 , B01J23/46 , B01J23/96 , B01J37/14 , B01J38/14 , F01N3/20
摘要： PROBLEM TO BE SOLVED: To prevent reduction of an activity by inhibiting grain growth of Rh and to recover the activity of a catalyst with the lowered activity in the catalyst for cleaning exhaust gas which is composed of a carrier containing at least ZrO 2 carrying at least Rh. SOLUTION: The catalyst is subjected to heat treatment at a temperature of 850-1,100°C under an atmosphere having a partial pressure of oxygen equivalent to an atmosphere. A production reaction and a decomposition reaction of Rh 2 O 3 approach the equilibrium state under the atmosphere having the partial pressure of oxygen equivalent to the atmosphere at 850°C or higher and the produced Rh species are fixed to the carrier in the extremely fine state. COPYRIGHT: (C)2004,JPO

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